. >> reporter: it was a bizarre ending to a crime that has shocked this city. the woman accused of pushing a man onto the train tracks screaming and smiling as cameras captured her arrest. this surveillance video led police to erica menendez. investigators say that's her running away from a train station in queens thursday night just moments after she shoved sunando sen off the platform. now she's reportedly admitting to the crime. i pushed a muslim off the train tracks because i hated them since they put down the twin tours. i have been beating them up since. the victim a hindu immigrant from india. he was a graphic designer who had just opened up his own printing company. >> i feel bad because i am broken in my heart, this guy is so quiet. >> reporter: sen's death comes weeks after a person was killed at another new york station. the video shows the suspect arguing with the victim minutes before his he pushed him off the platform. >> you never know who's going to push you onto the tracks or the street. >> reporter: those concerns led new york mayor michael bl